{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{8}{c}}
\toprule
                    &\multicolumn{2}{c}{\emph{E. coli} present}&\multicolumn{2}{c}{TC present} &\multicolumn{2}{c}{\emph{E. coli} (MPN)}&\multicolumn{2}{c}{TC (MPN)}   \\
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   &\multicolumn{1}{c}{(5)}   &\multicolumn{1}{c}{(6)}   &\multicolumn{1}{c}{(7)}   &\multicolumn{1}{c}{(8)}   \\
\midrule
Training            &       -0.06   &               &       -0.04   &               &       -0.34   &               &       -0.19   &               \\
                    &      (0.10)   &               &      (0.12)   &               &      (0.22)   &               &      (0.58)   &               \\
Training + supplies &        0.07   &               &       -0.17   &               &       -0.03   &               &       -0.98*  &               \\
                    &      (0.11)   &               &      (0.13)   &               &      (0.27)   &               &      (0.52)   &               \\
Training, any       &               &        0.01   &               &       -0.11   &               &       -0.18   &               &       -0.58   \\
                    &               &      (0.09)   &               &      (0.11)   &               &      (0.23)   &               &      (0.49)   \\
\midrule
T vs T $+$ S: $ p $ value&       0.237   &               &       0.318   &               &       0.095   &               &       0.127   &               \\
Control mean        &        0.22   &        0.22   &        0.69   &        0.69   &        0.51   &        0.51   &        2.37   &        2.37   \\
\bottomrule
\end{tabular}
}
